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The WAYWT Discussion Thread - Page 6720  

post #100786 of 117670
unfortunately not a statistics phd :/

However, why not just sample from the empirical distribution, and bootstrap for asymmetric (if the distribution is asymmetric) confidence intervals?

But I like the regression approach more, I think it would be very feasible to predict weight from what people have bought, e.g., rick owens is negatively correlated with weight, EG interacts with race, so if you are white and buy EG, you are on the heavy side, if asian, less so?
post #100787 of 117670
what the fuck
post #100788 of 117670
agreed Brad, akward joke from me...
post #100789 of 117670
i was referring to this entire conversation
post #100790 of 117670
..
Edited by SuperBobo - 9/2/13 at 3:57am
post #100791 of 117670
.
Edited by SuperBobo - 9/2/13 at 3:57am
post #100792 of 117670
Quote:
Originally Posted by theBigwig View Post
Warning: Spoiler! (Click to show)

 

Just a try



another day with same shoes

 

 

 

 

What's the tee? 

post #100793 of 117670
Quote:
Originally Posted by fuji View Post

Kind of strange when someone who just joined this month knows what your degree is, but I think this would be quite hard. I wouldn't assume the weight and height of members here are normally distributed. The left tail of the distribution is probably very heavy, there seems to be a lot of very short members and very thin members so it would probably look like chi squared distribution, but it obvs wouldn't be because we aren't just a bunch of squared normal results. Having created a formula for this distribution, doing the necessary integration and creating estimators for the parameters we could create some confidence intervals for the mean height and weight. I'd rather create a multivariate linear regression to estimate an SF members weight based on their height and the size of items of clothes they've bought and sold and if they lift. We may have to use some time series for how long ago they bought the clothes. We could probably get an R value of like 0.8.


I think Superbobo has like a masters or Phd in stats so he'd probably be better at this.

you're drunk (or posing) if you think you'd get an R(squared) of .8 from any 'natural' data set.
post #100794 of 117670
Quote:
Originally Posted by superego View Post

you're drunk (or posing) if you think you'd get an R(squared) of .8 from any 'natural' data set.


The post is a joke, I don't think anyone here is creating a linear regression model on sf members height and weight. I just put a random number in, apologies for not using realistic numbers for my theoretical regression model. Please if you would like to go ahead and write in a more realistic number go ahead.
post #100795 of 117670
ah, fair enough...given the model you specified, weight as y, height and clothes size as x, think something in the range of .2 would even be optimistic. likely lots of error as well (ie, big confidence intervals around coefficient estimates).
post #100796 of 117670
Quote:
Originally Posted by ropseau2 View Post

I don't think fuji is wrong, actually.  I think R^2 of .8 is quite reasonable, given how homogeneous the styleforum population is in terms of weight and height.  I am assuming Mr Moo (an outlier way out in the right tail) is removed though.

fuji's first approach to create unbiased estimators is quite reasonable.  I wouldn't a priori assume a distribution Chi^2 distribution.  I would treat it as a gamma distribution, and do what fuji says.

lol, what? distribution of the dependent variable doesn't matter provided they're IID and the errors are assumed (and checked) to be normal.
Quote:
Originally Posted by ropseau2 View Post

Well, clothes size is a different issue altogether. We may safely assume 99.9999999% try to squeeze themselves into XS or S, no matter what their height and weight.


Take Reedobandito, for example. height 5'10", or thereaobuts. Weight 160lb +/- 20lb, if I read his posts correctly.

Size XS!!!!!

Then there's Mr Moo! Height 5'5", or therebouts. Weight 295 lb, by his own admission last Tuesday!

Size S!!!!!!

There will be absolutely no correlation between weight and clothing size!


I would be far more concerned about reporting error (a systematic bias in the sampling), because of Styleforum members consistently underreporting their weight and clothes size.

smile.gif
post #100797 of 117670
MIRAN ?
post #100798 of 117670
Who cares.
post #100799 of 117670
fuck miran
post #100800 of 117670

in order to get this thread back on track and flaming people for dressing poorly instead of whatever the hell is going on now, I am going to post an mc fit with "slippers" so you all can get back to doing what you do best

x-post

Quote:
Originally Posted by Ian Erickson View Post

thrift fit from church today: andover shop, brooks brothers, henry rosen, j crew

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